Dry-shaving apparatus



July 10, 1945. v. KOBLER ETAL 2,379,969

DRY SHAVING APPARATUS Filed March 27, 1944 17 a 4/ 2 I 32 3 35 a;

4 7' 33 j 34 5 I Q Patented July 10, 1945' DBY-SHAVING APPARATUS VictorKobler and Werner Kobler,

. Zurich, Switzerland Application March 27, 1944, Serial 'In SwitzerlandFebruary 23,

12 Claims. (01. 30-41) with dry shaving apparatus having hollow tubularouter cutters it is known to close the two lateral openings of theshearing head by means of flaps, fo the purpose of preventing the haircuttings accumulating during the shaving in the interior of the shearinghead from being ejected, whereby the garment of the person using theshaving apparatus may be soiled. Hitherto such flapsimpaired thehandling of the apparatus andv were hindersome in cleaning the shavereven if the shearing head could be separated from the handle as well asif during the shaving it was desired now and then .to blow the haircuttings, out of the shearing head.

The object of the present invention is to elim inate these drawbacks.

The dry shaving apparatus, accordingto the present invention, which isprovided with an oblong hollow outer cutter secured to a handle and withpivotally displaceable flaps for closing th'e lateral openings of theshearing head as well as with an inner cutter which is arranged in theouter cutter and is longitudinally reciproca ble, is distinguished inthat the closure flaps are asso ciated with means which permit ofopening and closing the closure flaps in an easy manner with one handonly by the person using the apparatus.

This means is, advantageously, so arranged that with the same fingers asused for actuating said means also the fa'stening'device for theshearing head can be controlled or that said means operates with theshearing head fastening device directly in order to either open by thesame fln ger movements onlythe closure flaps as desired or by slightadditional movements of the fingers open the shearing liead fasteningdevice at the same time, for the purpose of removing the shearing headfrom the handle.

Several embodiments of the invention are illustrated in the accompanyingdrawing by way of example-only, in which Fig. 1 shows apartial elevationof the dry shaving apparatus inclusive of the shearing head as seen fromthe side of the apparatus;

Fig. 2 shows a crosssection of the shearing head;

Fig. 3 shows a cross-section of the shearing head closure on thelineIII-III in Fig. 1;

Fig. 4 exemplifies another embodiment in a perspective view of the upperpart of the dry 'shaving apparatus inclusive of the shearing head; Fig.5 shows a partial elevation of a further embodiment;

Fig. 6 shows a sectional elevation of still another embodiment;

Fig. 7 is an elevation similar to'Fig. 6 with the flaps and pivotalfinger pieces in position for removing the shearing head;

Fig. 8 is an interior view of a pivotal finger' piece and the associatedclosure flap; 7

Fig. 9 is a perspective view of a latch of the shearing head fasteningdevice;

Figs. 10 and 11 illustrate a still further embodiment in two similarsectional elevational views with parts in two different operatingpositions,and r Fig. 12 is a perspective view of a latch for theshearing head fastening device.

The numeral l designates the handle of the dry shaving apparatus towhich is s'ecuredby means of bolts 2 an oblong hollow outer cutterthrough the intermediary of a fastening device. Two such bolts eachhaving a groove-3 and a convexed end 4 are arranged in the shearing headin symmetrical relation thereto. This device includes fastening sleeves5 each carrying a recess 6 and an associated latch l the outer end ofwhich is bent over so as to form a control button 8 which buttonsproject out of the handle on the narrower sides thereof. The latches Isurround the fastening sleeves 5 (Fig. 3) by engaging in the recesses 6thereof and are: pressed outward by the action of compression springs 9.In putting the shearing head in place the convexed ends 4 of the bolts 2push the latches I in-. wardly until these enter into the grooves 3 inthe bolts 2 by snap action, thereby locking the shearing head inposition. By exerting pressure on the latches 8 the fastening device isreleased again so as to permit of removing the shearing head from thehandle.

The outer cutter is composed of a shell Ill and a bottom piece ll. Thesetwo parts form together a tubular oblong body which is open at both ofits ends. In the interior of said. body is guided in a groove II in thebottom piece ll an inner cutter 12 having a headed top l3. The

outer cutter is provided with gaps l4 between the cutting teeth in amanner known per se. The

same applies tothe headed top member of the inner cutter. This top bearsby means of its cutting end face against the inner cutting and face ofthe outer cutter under spring pressure an paratus.

known per se. This arrangement is not shown in the drawing for thepurpose of simplifying the illustration. The outer surface of the outercutter and the headed top of the inner cutter are arcuately convex asregards the longitudinal direction and have a V-shaped transverse crosssection. The inner cutter oscillates in an are described about a centreC.

n the handle I a cover plate I5 is arranged which is provided withhingesI6 that are positioned at the narrower sides of the handle insymmetrical relation to each other. With each of these hinges flaps l1are connected for pivoting movement thereabout, which flaps in theirnormal position shut in the inner cutter at both narrower handle sidesby action of springs i8 for allowing this cutter to function as a haircatch so that the hair cuttings are retained in the interior of thehandle.

The flaps l1 are provided with lever arms I! that are provided withpivots at 20. Stirrup shaped finger pieces. 22 are held at one end bythese pivots and at the other end in grooves 2| in the handle. Thesefinger pieces are so positioned that each of them can be controlled by adifferent finger of the hand holding the apparatus, for example, theforefinger 23 and the thumb 24. The finger pieces are pushed outward bythe springs l8 so as to act upon the lever arms I9 of the flaps I1 bymeans of the pivots 20 and blowing them out. The simple readily mademovement with fingers of the same hand as holding the apparatus enablesthe cuttings to be blown out of the shearing head several times duringthe shaving, which tends to lengthen the life and to promote the cuttingcapacity of the ap- In depressing the finger piece 28 the pivoting ofthe flaps I1 is first limited by said piece 22 bearing on the controlbuttons 8 of the latches I, that is, by the counter pressure ofthe latchsprings 8. In this position of the flaps 1 these are opened already tosuch an extent that the hair cuttings can then be blown out of theshearing head. Whenit is desired ,to removethe wardly whereby thefastening device is released as previously described.

The embodiment shown in Fig. 4 differs from the preceding embodiment bybeing devoid of a finger piece for Joint actuation of the flaps l1 andthe latch control buttons 8. The lever arm l9 which by action of aspring I8 is forced outwardly has such a length as to permit of beingactuated for. pivotally displacing the flaps i1 by the respectivefingers directly. Such an arm is positioned on both sides so close bythe latches 8 that joint control of the two latches is possible withcorresponding finger parts; 1

A further possible modification might consist in making the lever armsIt of the finger pieces I! in such lengths that in depressing said armsthese can bear against the latch controlbuttons 8 directly.

Fig. 5 shows a further modification which, instead of flaps II, as shownin Figs. 1 or 4, has arranged at both narrow. sides of the shearing heada sliding latch 25 which is retained .in a guide 26 of the cover platel5, The latches 25 are provided with lobes 21 having oblique faces 28.In the position of the control latches as shown the respective shearinghead opening is closed. If then the latch is pushed downwardly into thedotted line position as indicated by the \is uncovered. In furtherdisplacingthe control latch the oblique face 28- on the lobe 21 forcesthe control head 8 on the latch inwardly whereby the shearing headlocking device is released.

In a fifth embodiment as shown in Figs. 6 to 9, means are provided bycontrol of which the flaps are moved into an open position appropriatefor removing the hair cuttings without the possibility of influencingthe shearing head fastening device, this influencing being feasible inanother position of the flaps. To this end the pivotal closure flaps areadvantageously mounted for rotation in the pivotal finger pieces forcon- 0 trolling the same, in which way the manufacture of the controlmeans for the closure fiapsis simplified and cheapened.

Advantageously, the mounting of the control means is so carried intoefiect that in slots which 5 have inner open ends and are arranged inthe side walls of trough shaped pivotal finger pieces a .bent of! lowerart of the closure flap is inserted.

The outer cutter iii, the gaps, it between the cutting teeth, theconnecting bolts 2 inclusive of thegrooves 8 and the convexed ends 4'thereof, the fastening sleeves 5 inclusive of the recesses 6 thereof,and the instant inner cutter which is however not shownin the drawingare of the same construction as in the pre ding embodiments. I

The cover plate It of the handle I is provided at its longitudinal endswith apertures at which constitute twov stop shoulders 81 and '82. Thelatches or slides cooperating with the grooves 3 have twoterminalupstanding projections 33 and are forced outwardly by coiledwire springs 34'. The pivotal closure fiaps l I are rotatably mounted inthe finger pieces 22'- for Said pieces are of trough like form.

In the side walls 34 of the troughs forming the finger pieces slots 35with inner open ends are provided in each of which engages a bent onpertion 31 refining a recess 38 in the respective 'closure flap ii. Themedian part 88 of the bent of! portion 31 is acted upon by atorsionspring 39 which surrounds the pivot 48 of the finger piece 22'. Theother end of the torsion spring is secured to one of the sidewalls 84.;By means of the pivot 40 the finger piece 22' is mounted in sure flapI1 is forced towardsthe open end of the inner cutter l0 whilst thefinger piece 22' is, forced outwardly until its nose I firmly bearsagainst the stop shoulder 8| on the cover. plate IS. on the left handside of Fig; 6 the closure flap i1 and the finger piece 22 are shown inpositions in which the hollow space of the inner cutter i0 is closed.

If it is desired to open the closure flaps l'l' for removing the haircuttings the pivotal finger arrow, first the respective shearing headopening their control.

the handle 1. By action of the spring 39 the cloplaced into an inclinedposition. If it is required to remove the shearing head the two closureflaps ll are further turned by the thumb and one of the other fingers ofthe other hand into the, position shown in Fig. 7. Due to this movementthe part as of'the pivotal flap 11' hits the projections 33, therebydisplacing the slide 1' 1n-' Wardly against the action of the spring 34'so that the slide disengages from the groove 3 and the shearing head canbe removed from the handle .I with the same fingers that have completedthe I turning movement of the closure flaps l'l (Fig. 7

The embodiment shown in Figs. 10 to 12 differs from that precedinglydescribed only in regard to certain details. The slide 1" is providedwith longitudinally reciprocable relation to the oblong hollow portionof said outer cutter, pivotal closure flaps arranged on said shearinghead at the sides of said handle adjacent to the longitudinal a hand asused in shaving with the apparatus, and

a depending ledge 42 instead of projections 33" and the side walls ofthe pivotal finger piece ll' are provided with recesses 43 into whichthe ledge 42 engages when the pivotal finger piece is forced inwardlyinto the position shown. in Fig. 11 for the purpose of opening theclosure flap ll. Fig. 10 shows the closure flap Il' in closed position.If it is desired to remove the shearing head the closure flaps Il' arefurtherpivotallydisplacedas in the preceding embodiment. By this'meansthe spring 39 being pushed inward by the part 38101 the flap l1cooperates with the ledge 42 so as to displace the slide 1" inwardly.

Still further modifications can be made without going beyond the scopeof the invention. The mounting of the closure flaps for rotation in thepivotal finger pieces facilitates the appropriate closing effect of thepivotal flaps and is a pre- .rocable relation to the oblong hollowportion of said outer cutter, controllable closure fiaps arranged onsaid shearing head atthe sides of said handle adjacent to thelongitudinal ends of said means for actuating said flap control meansand said releasable fastening means in required sequence.

4. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving aninner cutter inlongitudinally reciprocable relation to the oblong hollow portion, ofsaid outer cutter,

pivotal closure flaps arranged on said shearing head at the sides ofsaid handle adjacent to the longitudinal ends of said outer cutter, ofcontrol means arranged on said closure flaps allowing of pivotallydisplacing said flaps conveniently with the same hand as used in shavingwith the apparatus, and means for positively actuating said flap controlmeans and said releasable fastening means by a corresponding relativemovement of said control means and said fastenin means, I

5. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle andreceiving an inner cutter in longitudinally reciprocable relation to theoblong, hollow portion of said outer cutter, controllable closure flapsarranged on said shearing head at the sides of said handle adjacent tothe longitudinal ends of said outer cutter, of control means associatedwith said closure flaps, and finger operable means as sociated with saidcontrol means, allowing of opening said flaps by slight pressureexertion on said finger operable means and of closing said Outer cutter,of control means associated with said closure flaps allowing of openingand closing said flaps conveniently with the same hand as used inshaving with the apparatus. I

2. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means, and receiving-an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, controllable closure flaps arranged on said shearinghead at the sides of said handle adjacent to the longitudinal ends ofsaid outer cutter, of control means associated with said closure flapsallowing of opening and closing said flaps convenientflaps by releasingsaid finger pressure.

6. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a collecting space forhair cuttings interiorly of said shearing head, controllableclosureflaps arranged on said shearing head at the sides of said handleadjacent to the longitudinal ends of said outer cutter, of control meansfor saidreleasing means associated with said closure flaps allowing ofopening said flaps into position of removing said hair cuttings -fromsaid head andclosing said flaps again, and

means for preventing said flap control means from influencing saidreleasable fastening means while moving into said opening position, saidfastening means being opened by further opening movement of said flaps.

7. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a. collecting space forhair cuttings interiorly of said shearing head, controllable closureflaps arranged on said shearing head at the sides of said handleadjacent to the longitudinal ends of said outer cutter, of pivotalcontrol finger pieces associated with said closure flaps allowing ofopening said flaps into position of removing said hair cuttings fromsaid head and closing said flaps again, means for rotatably mountingsaid closure fiaps in said finger pieces, and means for preventing. saidfinger pieces from influencing said releasable fastening means whilemoving into said opening position, said fastening means being opened byfurther opening movement of said flaps.

8. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a collecting space forhair cuttings interiorly of said shearing head, controllable closureflaps arranged on said shearing head at the sides of said outer cutter,of pivotal control finger pieces associated with said closure flaps andhaving an inner portion fulcrumed to said handle, spring means forforcing said finger pieces-outwardly relative to said handle'forpreventing said finger .pieces from influencing said releasablefastening means while moving into said opening position, said fasteningmeans being opened by further opening movement of said flaps.

9. In a dry shaving apparatus, the combinationwith a shearing headincluding, an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a collecting space forhair cuttings interiorly of said shearing head, controllable closureflaps arranged on said shearing head at the sides of said handleadjacent to the longitudinal ends of said outer cutter, of. pivotalcontrol finger pieces associated with said limited by said stops, apoint of said inner portion of each finger piece beyond said fulcruminfluencing said fastening means for releasing said fastening means, andspring means for forcing .said finger pieces outwardly relative to saidhandle and said flaps into closing position.

10. In a. dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a collecting space forhair cuttings interiorly of said shearing head, controllable closurefiaps arranged on said shearing head at the sides of said handleadjacent to the longitudinal ends of said outer cutter, of.

each of said finger pieces in the course of said pieces moving inwardlyrelative to said handle by which movement said flaps are opened'aslimited by; said stops, a point of said inner portion of each fingerpiece beyond said fulcrum influencing said fastening means forreleasing'said fastening means, stops provided on said handle forlimiting the movement of said finger pieces outwardly relative to saidhandle, and spring means for forcing said finger-pieces outwardlyrelative to said handle and said flaps into closing position.

11. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to a handle byreleasable fastening means and receiving an inner cutter inlongitudinally reciprocable relation to the oblong hollow portion ofsaid outer cutter, said inner cutter defining a collecting space forhair cuttings interiorly of said shearing head, controllable closureflaps arranged on said shearing head at the sides of said handleadjacent to the longitudinal ends of said outer cutter, of pivotaltrough like control finger pieces associated with said closure flapsfulcrumed to said handle and having slots with inner open ends in thetrough side walls for mounting engagement with said flaps and beingfulcrumed at an inner por- 1 while moving into said opening position,said fastening means being opened by further opening movement of saidflaps.

12. In a dry shaving apparatus, the combination with a shearing headincluding an oblong hollow outer cutter secured to handle by' releasablefastening means and receiving an inner cutter'in longitudinallyreciprocable relation to the oblong hollow portion of said outer cutter,said inner cutter defining a collecting space for hair cuttingsinteriorly of said shearing head,

controllable closure flaps each having a bent ofl portion provided withan aperture having a lower limiting face, said flaps being arranged onsaid shearing head at the sides of said handle adjacent to thelongitudinal ends of said outer cutter, of pivotal control finger piecesarranged on said closure flaps with their pivot axis formed by saidlimiting face of said aperture and being adapted to move inwardlypivotally, and spring means engaging said limiting face for forcing saidfinger pieces outwardly relative to said handle and said flaps intoclosing position, said engage the fastening means during the first partof their inward movements.

- VICTOR KOBLER.

WERNER KOBLER.

